CAPACITIVE TOUCH CONTROLLERS
AT42QT5320/AT42QT5480
Versatile QTwoTM Based Two TouchTM Touchscreen Solutions
The AT42QT5320 and AT42QT5480 ICs are high-performance, state-of-the-art touch
interface controllers that provide single- and dual-finger touch gestures for intuitive
user interfaces. They are highly adaptable and allow users to choose between:
■
■
■
■
A Dual Two Touch Touchscreen Providing Two, Fully Independent and Trackable
Touch Coordinates
A Touch Keypad with up to Forty Eight Individually Configurable Keys
Up to Six Independent Touch Slider or Wheel Controls
A Hybrid Panel Featuring a Mixture of all Three of These Control Elements
Versatile, Flexible and Easy to Use
The QT5320 and QT5480 are both single
chip solutions and combine Atmel’s QTwoTM,
QMatrixTM, QSlideTM, QWheelTM, and QFieldTM
technologies in a single package.
Demonstrated on screens of up to 8-inch
diagonal, and with a wide variety of configuration
options, these chips are ideal for a huge range of
applications:
■ Small Scale Handheld Devices
■ Media Players
■ Navigation Systems
■ E-Book Readers
■ Fixed Control Panel Applications (Kitchen
Appliances, Vending Machines, etc.)
Both ICs are supplied in surface mount packages
and require only a few additional components to
produce a working circuit.
The touch screen and the touch controller IC are
interconnected by a 14 or 16 line passive tail and
can be separated by up to 60 mm.
Only three lines (a two wire I2C-compatible and a
single CHANGE event line) are required to connect
the touch controller to the host processor.
Advanced Technology that is Flexible, Adaptable
and Easy to Use
Atmel’s patented scanning technique provides many configuration possibilities, including the
creation of true dual-touch touchscreens.
Precision Touch Sensing with QTwo
Atmel’s QTwo ICs make use of timed multiplex sensing to read a matrix array of sense
electrode nodes arranged on the touch panel. Each node is scanned sequentially at high
speed to provide precise identification of the position and degree of the user’s touch.
Different configurations of X and Y lines provide custom performance levels that can be
configured for the specific application. The raw output data from the scan can be used in
many different ways.
Genuine Two Touch Touchscreens
When the touchscreen is touched with a dual-finger gesture, the ICs generate precise X-Y
coordinates for two, fully independent touch positions. These positions can be identified and
tracked anywhere across the screen surface on screens of up to 8" diagonal (QT5480 only
– the maximum screen size for the QT5320 IC is 4.3").
Both ICs have a full palette of Two Touch interface gestures built in:
■ Pinch (zoom in)
■ Press and Double Tap
■ Stretch (zoom out)
■ Press and Flick
■ Rotate
■ Press and Drag
■ Press and Tap
■ Two-finger drag
Multikey Keypads
In QMatrix mode, the QT5480 can also control up to 48 (or 32 for the QT5320) discrete touch
keys in a 8x6 (8x4) X-Y input matrix.
The chips can control a wide range of different sizes and shapes of keys, and the sensitivity
of each key is individually configurable. Atmel’s patented Adjacent Key SuppressionTM (AKSTM )
ensures that tightly spaced keys can be discriminated and a guard channel feature provides
reliable rejection of false inputs.
Multiple Slide Controls
In QSlide/QWheel mode the QT5320 can provide up to 4 sliders and QT5480 can control up
to 8 (or 6 for the QT5320) touch sliders or wheels.
Each slider or wheel requires a single Y line of the keypad input matrix, but the resolution is
selectable and each slider can be from 2 to 8 keys long. Using 8 keys in a slider/wheel will
allow a resolution of up to 8 bits to be achieved.
Hybrid Panels
Both ICs can be configured to allow the creation of hybrid panels containing a mix of
touchscreen, sliders, wheels and discrete keys. A very wide range of object combinations
can be configured – see each IC’s datasheet for full details.
Advanced Signal Processing
The QT5320 and QT5480 ICs are packed with features that provide reliable and
fast operation even in electrically noisy environments.
Atmel’s patented charge-transfer acquisition method provides best in class EMC
performance and will allow effective operation with both double and single layer
sensor designs.
Adjacent Key Suppression (AKS), the force sensor input, and a guard channel
feature provide multiple layers of touch event discrimination and ensure reliable
keying.
Evaluation and Demonstration Boards
Atmel offers a range of evaluation and demonstration kits available for both ICs.
The kits allow you to quickly assess the performance of the ICs without the need
to develop an application specific sensor. The range includes two different sizes
of touchscreen sensors, with and without ground shielding, and an extreme
landscape format a PCB-based touchscreen evaluation kit.
PC Software is Available from
Atmel to Support Development
with the Touchscreen
Evaluation Boards.
The boards are supplied together with PC host software, gesture algorithms, USB
cables and a full range of documentation. See the table below for more details.
QT5320/5480 Evaluation Kits include Boards,
Software, Cables and Documentation.
Part No
Description
Screen Size/Ratio
Integral
Groundshield
EVK5480A
Two Touch – touchscreen evaluation kit demonstrating the
AT42QT5480
3.3"/3:2
No
EVK5480B
Two Touch – touchscreen evaluation kit demonstrating the
AT42QT5480
3.3"/3:2
Yes
EVK5480C
Two Touch – touchscreen evaluation kit demonstrating the
AT42QT5480
4.3"/16:9
No
EVK5480D
Two Touch – touchscreen evaluation kit demonstrating the
AT42QT5480
4.3"/16:9
Yes
EVK5480E
PCB based Two Touch – touchscreen evaluation board for
AT42QT5480 (QT5320)
3.1"/18:10
No
Technical Support
Headquarters
Atmel’s touch technology is backed up by comprehensive technical documentation and support based
on Atmel’s unparalleled experience in the touch sense industry.
We have strong relationships with both materials and service suppliers and we can help you locate all of
the resources you require to get your product to market. Once a design is in place, Atmel will work with
you and its partners to quickly move the product right through from early prototype to full production.
To
■
■
■
Atmel Corporation
2325 Orchard Parkway
San Jose, CA 95131
USA
Tel +1-408-441-0311
Fax +1-408-487-2600
International
help you get the result you want Atmel provides:
Guaranteed reliability
Easy customisation
The supply chain flexibility required for large projects.
Atmel Asia
Unit 1-5 & 16, 19/F
BEA Tower, Millennium City 5
418 Kwun Tong Road
Kwun Tong, Kowloon
HONG KONG
Tel +852-2245-6100
Fax +852-2722-1369
Call us to find out more.
System Parameters
Atmel Europe
Le Krebs
8, Rue Jean-Pierre Timbaud
BP 309,78054
Saint-Quentin-enYvelines Cedex
FRANCE
Tel +33-1-3060-7000
Fax +33-1-3060-7111
Technology
Patented spread spectrum charge transfer (transverse mode)
Sensor layers
One layer (Single Touch) or two layers (Two Touch)
Screen minimum edge
wiring
4.5 mm not including bonding area (depends on screen construction technology)
Panel Materials
Plastic, Glass, Composites, Painted Surfaces (low particle density metallic paints
possible)
Panel thickness
1.0 to 2 mm glass - 0.5 to 1.5 mm plastic
QT5320 touchscreen size
Up to 4.3 inches diagonal
QT5480 touchscreen size
Up to 8 inches diagonal
Resolution
10-bit (1024 x 1024)
Screen material
ITO (Indium Tin Oxide)
Product Contact
Host interface
I C-compatible slave mode (100 kHz or 400 kHz)
2
Touch response time
60 msec initially, 15 to 20 msec for updates
Signal processing
Self calibration, auto drift compensation, LCD noise filtering and Adjacent Key
SuppressionTM (AKSTM )
Atmel Touch Technology
Division
1 Mitchell Point, Ensign Way
Hamble, Southampton
Hampshire SO31 4RF
UNITED KINGDOM
Tel +44-23-8056-5600
Fax +44-23-8045-3939
QT5320/5480 ICs – Electrical and Environmental Specifications
Recommended Operating Conditions
Power supply
Web Site
www.atmel.com
Environmental Specifications
-40o to +85oC
Storage temperature
-55o to +125oC
© 2008 Atmel Corporation. All
rights reserved.
DC Specifications
Supply current (sleep mode)
<2 µA @ 3.3V
Supply current (active/touched)
<4900 µA @ 3.3V (high speed mode)
Supply current (idle/not touched) <2740 µA @ 3.3V (high speed mode)
Package Options
QT5320 32 pins,
5 mm x 5 mm
QFN RoHS compliant
QT5480 49 balls, 5 mm x 5 mm
BGA RoHS compliant
QT5480 44 pins,
7 mm x 7 mm
QFN RoHS compliant
QT5480 44 pins,
10 mm x 10 mm TQFP RoHS compliant
Product Line
touch@atmel.com
Literature Requests
www.atmel.com/literature
+1.8V to +5.5V (2.5V to 5.5V in high speed
mode)
Operating temperature
Atmel Japan
9F, Tonetsu Shinkawa Bldg.
1-24-8 Shinkawa
Chuo-ku, Tokyo 104-0033
JAPAN
Tel +81-3-3523-3551
Fax +81-3-3523-7581
The QT5320 and QT5480 are available in
small packages, required for the use in
handheld applications
Disclaimer: The information in this document is provided in connection with Atmel products. No license, express or implied, by estoppel or otherwise, to any intellectual property right is granted by this document or in connection with the sale
of Atmel products. EXCEPT AS SET FORTH IN ATMEL’S TERMS AND CONDITIONS OF SALE LOCATED ON ATMEL’S WEB SITE, ATMEL ASSUMES NO LIABILITY WHATSOEVER AND DISCLAIMS ANY EXPRESS, IMPLIED OR STATUTORY
WARRANTY RELATING TO ITS PRODUCTS INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, OR NON-INFRINGEMENT. IN NO EVENT SHALL ATMEL BE LIABLE
FOR ANY DIRECT, INDIRECT, CONSEQUENTIAL, PUNITIVE, SPECIAL OR INCIDENTAL DAMAGES (INCLUDING, WITHOUT LIMITATION, DAMAGES FOR LOSS OF PROFITS, BUSINESS INTERRUPTION, OR LOSS OF INFORMATION) ARISING
OUT OF THE USE OR INABILITY TO USE THIS DOCUMENT, EVEN IF ATMEL HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. Atmel makes no representations or warranties with respect to the accuracy or completeness of the
contents of this document and reserves the right to make changes to specifications and product descriptions at any time without notice. Atmel does not make any commitment to update the information contained herein. Unless specifically provided
otherwise, Atmel products are not suitable for, and shall not be used in, automotive applications. Atmel’s products are not intended, authorized, or warranted for use as components in applications intended to support or sustain life.
Atmel®, Atmel logo and
combinations thereof,
QTouchTM, QFieldTM, QTwoTM,
QMatrixTM, QSlideTM, QWheelTM,
Two TouchTM, Adjacent Key
SuppressionTM, AKSTM and
others, are registered trademarks
or trademarks of Atmel
Corporation or its subsidiaries.
Other terms and product names
may be trademarks of others.
Rev.: 10610A-AT42-10/08/0M